79 lines
2.5 KiB
Swift
79 lines
2.5 KiB
Swift
/*
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* QRCodeReader.swift
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*
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* Copyright 2014-present Yannick Loriot.
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* http://yannickloriot.com
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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import UIKit
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/// Overlay over the camera view to display the area (a square) where to scan the code.
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final class ReaderOverlayView: UIView {
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private var overlay: CAShapeLayer = {
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var overlay = CAShapeLayer()
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overlay.backgroundColor = UIColor.clear.cgColor
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overlay.fillColor = UIColor.clear.cgColor
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overlay.strokeColor = UIColor.white.cgColor
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overlay.lineWidth = 3
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overlay.lineDashPattern = [7.0, 7.0]
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overlay.lineDashPhase = 0
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return overlay
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}()
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init() {
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super.init(frame: CGRect.zero) // Workaround for init in iOS SDK 8.3
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layer.addSublayer(overlay)
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}
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override init(frame: CGRect) {
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super.init(frame: frame)
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layer.addSublayer(overlay)
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}
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required init?(coder aDecoder: NSCoder) {
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super.init(coder: aDecoder)
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layer.addSublayer(overlay)
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}
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override func draw(_ rect: CGRect) {
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var innerRect = rect.insetBy(dx: 50, dy: 50)
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let minSize = min(innerRect.width, innerRect.height)
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if innerRect.width != minSize {
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innerRect.origin.x += (innerRect.width - minSize) / 2
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innerRect.size.width = minSize
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}
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else if innerRect.height != minSize {
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innerRect.origin.y += (innerRect.height - minSize) / 2
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innerRect.size.height = minSize
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}
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let offsetRect = innerRect.offsetBy(dx: 0, dy: 15)
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overlay.path = UIBezierPath(roundedRect: offsetRect, cornerRadius: 5).cgPath
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}
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}
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